Legal Proceedings (Details) (USD $)	0 Months Ended	3 Months Ended						3 Months Ended
	Dec. 14, 2008	May 04, 2013	Apr. 28, 2012	Feb. 02, 2013 Claimant	Dec. 10, 2010	Dec. 14, 2007	Mar. 07, 2013 Positive Outcome of Litigation [Member]	Feb. 02, 2013 Computer Network Intrusion [Member] Threatened Litigation [Member]
Loss Contingencies [Line Items]
Minimum estimated undiscounted costs of preparing RIFS for remedial alternatives		$ 0
Maximum estimated undiscounted costs of preparing RIFS for remedial alternatives		24,000,000
Present worth for remedy of a combination of groundwater extraction and treatment and in-site chemical oxidation		10,700,000
Minimum historical cost associated with enhanced treatment required by the impact of groundwater plume		1,800,000
Maximum historical cost associated with enhanced treatment required by the impact of groundwater plume		2,500,000
Future operation and maintenance costs		126,400
Minimum amount of complaint under number of state law theories						41,000,000
Period of complaint under number of state law theories	70 years
Amount related to outstanding environmental contingencies		11,900,000	12,500,000	11,900,000
Pretax accruals for environmental contingencies included in provision for discontinued operations		200,000	300,000
Approximate claims asserted against the company's acquiring bank					15,600,000
Number of claimants				2
Charges recorded to earning								15,400,000
Gain contingency, unrecorded amount							$ 13,300,000